Tom you and I could hardly work out the mathematic problem ?A. could you B. couldn’t I C.

问题补充：

Tom,you and I could hardly work out the mathematic problem, ?

A. could you

B. couldn’t I

C. couldn’t we

D. could we

答案：

A. could you

B. couldn’t I

C. couldn’t we

(答案→)D. could we

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